In a scathing attack on the media, Prince Harry said he felt it was "very unfair" that the Duke and Duchess of Cambridge were "forced to publicise" that Kate was pregnant in December.
More top news
Rain will spread southeastwards through N. Ireland, Wales and England overnight.
The woman used her daughter's own Facebook page to live-stream the attack after the teenager posted provocative pictures online.
A senior employee at the organisation reportedly derided the three-year-old royal for being 'royal, rich' and "advantaged'.